Description
The mod_dav_svn Apache HTTPD server module in Subversion 1.6.0 through 1.6.20 and 1.7.0 through 1.7.8 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an anonymous LOCK for a URL that does not exist.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | subversion | 1.7.9-1 | — |
| Debian 13 | subversion | 1.7.9-1 | — |
| Debian 12 | subversion | 1.7.9-1 | — |
| Debian 6.0 | subversion | 1.6.12dfsg-7+deb6u2 | DLA-207-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | subversion +8 | 1.6.11-9.el6_4 | RHSA-2013:0737 |
| RHEL 5 | subversion +5 | 1.6.11-11.el5_9 | RHSA-2013:0737 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | subversion | 1.9.5-1.1 | openSUSE-SU-2024:10538-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Apache Subversion 1.6.x - 'mod_dav_svn/lock.c' Remote Denial of Service EDB-38421 · dos · Apr 5, 2013 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- RHSA-2013:0737 Red Hat Security Advisory: subversion security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DLA-207-1 subversion - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10538-1 libsvn_auth_gnome_keyring-1-0-1.9.5-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- openSUSE-SU-2013:0687 vendor-advisory
- RHSA-2013:0737 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=929090
- [subversion-announce] 20130404 Subversion 1.6.21 released mailing-list
- http://subversion.apache.org/security/CVE-2013-1847-advisory.txt
- [subversion-announce] 20130404 Apache Subversion 1.7.9 released mailing-list
- USN-1893-1 vendor-advisory
- oval:org.mitre.oval:def:18538 vdb-entry signature
- openSUSE-SU-2013:0932 vendor-advisory
- MDVSA-2013:153 vendor-advisory